The Dresden Files Season 1 Episode 7 Walls ( Air Date 2007-03-11 ) Genre Sci-Fi & Fantasy, Mystery, Drama, Action & Adventure category. Overview "Harry investigates the death of a college student which leads him to a most unusual ring of thieves. A group of students is using magick to commit a series of impossible thefts, and Harry must stop them quickly. Not only because what they are doing is wrong, but also because the magick will eventually kill them all.".